Wideband signal processing

摘要

A biquad wideband signal processing circuit can operate over bandwidths of 50 MHz to 20 GHz or more. The biquad circuit employs a configuration of integrators (transconductors), buffers, and scalable summers that can be implemented using deep sub-micron CMOS technology. Combining this scaling with high gain/high bandwidth enables implementation of feedback and programmability for broadband analog signal processing. A biquad circuit implementing a number of parallel integrator lines having adjustable gain provides greater accuracy, stability, and bandwidth, and allows for control of process variations and temperature variation in real-time.

主权项

1. A circuit for processing a wideband signal, comprising:
a first stage comprising:
a first summing circuit configured to receive an input signal, anda first plurality of integrator lines configured to receive an output of the first summing circuit, each of the first plurality of integrator lines including at least one integrator circuit, the first summing circuit configured to receive an output of each of the first plurality of integrator lines; and a second stage comprising:
a second plurality of integrator lines configured to receive the output of the first summing circuit, each of the second plurality of integrator lines including at least one integrator circuit, anda second summing circuit configured to receive an output of each of the second plurality of integrator lines, the second summing circuit further configured to output an output signal.